Search Results 1-20 of 27

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  • Three-dimensional Numerical Simulation of Dense Gas-Solid Flow in Circulating Fluidized Bed under Rolling Motion of Ship

    Oka Hideyuki , Murata Hiroyuk , Harumi Kazuyoshi , Kuwayama Tomokazu , Tsuboi Kazumasa , Adachi Masaki

    … To investigate the effects of ship motion on circulating fluidized beds (CFBs), three-dimensional numerical simulations of dense gas-solid flows have been carried out with a two-fluid model and its sub-models based on the kinetic theory of granular flows. …

    Marine Engineering 45(Special), 1004-1011, 2010

    J-STAGE 

  • Effects of Reduced Surface Tension on Void Drift between Triangle Tight Lattice Subchannels  [in Japanese]

    SADATOMI Michio , KAWAHARA Akimaro , HIGUCHI Tatsuya

    … In the experiment, a channel having two subchannels simplifying the triangle tight lattice subchannels was used. … Experimental data were obtained for both air-water and air-water with a surfactant flows to know the effects of the reduced surface tension on flow and void redistributions due to the void drift. …

    Progress in Multiphase Flow Research (4), 69-76, 2009

    J-STAGE 

  • Poloidal Flow Generated by Drift-Tearing Mode

    NISHIMURA Seiya , YAGI Masatoshi , ITOH Sanae-I. , ITOH Kimitaka

    … The nonlinear simulation of collisional drift-tearing mode is performed using the reduced two fluid model, and the characteristics of poloidal flow generated by tearing mode is investigated in the phase of magnetic island formation. …

    Journal of the Physical Society of Japan 77(1), "014501-1"-"014501-8", 2008-01-15

    IR  DOI  References (27)

  • High-beta axisymmetric equilibria with flow in reduced single-fluid and two-fluid models

    Atsushi ITO , Jes?s J. RAMOS , Noriyoshi NAKAJIMA

    Reduced single-fluid and two-fluid equations for axisymmetric toroidal equilibria of high-beta plasmas with flow are derived by using asymptotic expansions in terms of the inverse aspect ratio. … Two different orderings for the flow velocity, comparable to the poloidal Alfv?n velocity and comparable to the poloidal sound velocity, are considered. …

    Plasma and Fusion Research (Vol.3), 034-1 - 034-7, 2008-01-01

    IR 

  • Poloidal Flow Generated by Drift-Tearing Mode

    Nishimura Seiya , Yagi Masatoshi , Itoh Sanae-I. , Itoh Kimitaka

    … The nonlinear simulation of the collisional drift-tearing mode is performed using a reduced two-fluid model, and the characteristics of poloidal flow generated by the drift-tearing mode is investigated. …

    Journal of the Physical Society of Japan 77(1), 014501-014501, 2008

    J-STAGE 

  • High-Beta Axisymmetric Equilibria with Flow in Reduced Single-Fluid and Two-Fluid Models

    ITO Atsushi , RAMOS Jesús J. , NAKAJIMA Noriyoshi

    Reduced single-fluid and two-fluid equations for axisymmetric toroidal equilibria of high-beta plasmas with flow are derived by using asymptotic expansions in terms of the inverse aspect ratio. … Two different orderings for the flow velocity, comparable to the poloidal Alfvén velocity and comparable to the poloidal sound velocity, are considered. …

    Plasma and Fusion Research (3), 034-034, 2008

    J-STAGE 

  • Excitation of macromagnetohydrodynamic mode due to multiscale interaction in a quasi-steady equilibrium formed by a balance between microturbulence and zonal flow

    A. Ishizawa , N. Nakajima

    … This is the first numerical simulation demonstrating that a macromagnetohydrodynamic (macro-MHD) mode is excited as a result of multi-scale interaction in a quasi-steady equilibrium formed by a balance between microturbulence and zonal flow based on a reduced two-fluid model. …

    Physics of Plasmas Vol.14(Issue 4), pp.040702-1 - 040702-4, 2007-04-01

    IR 

  • Effects of Surface Tension on Void Fraction in a Multiple-Channel Simplifying Triangle Tight Lattice Rod Bundle-Measurement and Analysis

    SADATOMI Michio , KAWAHARA Akimaro , KUDO Hiroyuki , SHIRAI Hiroshi

    … In order to know the effects of reduced surface tension on void fraction, adiabatic experiments were conducted for both air-water and air-water with surfactant systems at room temperature and pressure. … Void fraction data were obtained for bubbly, slug, churn and annular flows in a vertical channel with two subchannels simplifying a triangle tight lattice rod bundle. …

    Journal of Power and Energy Systems 1(2), 143-153, 2007

    J-STAGE 

  • ICONE15-10754 CONDITIONS OF THE FLUID IN THE RHRS PIPE LINE AFTER THE LOSS AND RESTART OF THE RHRS PUMP

    Guey Ching , Miller Joseph S.

    … Due to a recent event at pressurized water reactor (PWR), the impact of a loss of shutdown cooling during reduced RCS inventory conditions was evaluated. … It uses a one-dimensional, two-fluid model, consisting of steam and water, with the possibility of the vapor phase containing a non-condensable component. …

    The Proceedings of the International Conference on Nuclear Engineering (ICONE) 2007.15(0), _ICONE1510-_ICONE1510, 2007

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  • Study of Thermal Transport Effects on Drift-Tearing Mode

    Nishimura Seiya , Ito Sanae-I. , Yagi Masatoshi , Azumi Masahumi , Ito Kimitaka

    … The linear analysis of the drift tearing mode based on four-field reduced two fluid model is performed to investigate thermal transport effects on the growth rate. …

    Reports of Research Institute for Applied Mechanics,Kyushu University (131), 1-12, 2006-09

    IR  DOI 

  • Gas-condensate well test results interpretation at Helang field

    Chai Ooi Kiam , Kano Takeshi , Tomoeda Jotaro

    ガスコンデンセート貯留層は, ガスとコンデンセートの二相系であるため, 露点圧力以下になった場合, 坑井近傍で複雑な挙動を示す。坑井テストの圧力解析で易動度の異なる2つの領域が観察されることが, 多数の文献 (Gringarten <i>et al.</i>, Marhaendrajana, Raghavan) においてフィールドデータより示されている。これら2つの易動度領 …

    Journal of the Japanese Association for Petroleum Technology 71(6), 564-573, 2006

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  • 27pUD-6 Turbulant Transport Model based on the Reduced Two-Fluid Equations and Transport Simulation  [in Japanese]

    IZUMI Yoshihiro , HONDA Mitsuru , FUKUYAMA Atsushi

    Meeting Abstracts of the Physical Society of Japan 61.1.2(0), 206, 2006

    J-STAGE 

  • OS8-2 Analysis of Void Fraction in a Multiple-Channel Simplifying Triangle Tight Lattice Rod Bundle by a Two-Fluid Model  [in Japanese]

    SADATOMI Michio , KAWAHARA Akimaro , KUDOU Hiroyuki , SHIRAI Hiroshi

    … Void fraction data were obtained for air-water and air water with surfactant flows in a vertical channel with two subchannels simplifying a triangle tight lattice rod bundle. … In order to study the cause of the data trend, for annular flows as a first step, the void fraction was calculated by a two-fluid model subchannel code using several wall and interfacial friction correlations, and by assuming the liquid film to be uniform over the wall perimeter. …

    The Proceedings of the National Symposium on Power and Energy Systems 2006.11(0), 205-206, 2006

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  • 24aA40P Analysis of Turbulent Transport in Tokamak Using the Reduced Two-Fluid Model  [in Japanese]

    IZUMI Yoshihiro , HONDA Mitsuru , FUKUYAMA Atsushi

    プラズマ・核融合学会年会予稿集 (21), 140, 2004

    NDL Digital Collections 

  • Development of Predictable Technology for Thermal/Hydraulic Performance of Reduced-Moderation Water Reactors (3) : Current Status of Development of Three-Dimensional Two-Phase Flow Simulation Method  [in Japanese]

    YOSHIDA Hiroyuki , TAMAI Hidesada , TAKASE Kazuyuki , AKIMOTO Hajime

    … The Reduced-Moderation Water Reactor (RMWR) adopts a tight-lattice core with triangular fuel rod arrangement and remarkably narrow gap spacing between rods. … Thus, we start to develop a mechanistic BT model using advanced numerical simulation technology to resolve the geometry effects. … In this paper, we describe the outline of newly developed 3-D two-phase flow simulation method and show an example to investigate the spacer effect in the annular-mist flow. …

    The proceedings of the JSME annual meeting 2003.3(0), 251-252, 2003

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  • Experiment and Analysis of Two-Phase Natural Circulation in Double Cylinders  [in Japanese]

    MINATO Akihiko , NAGAYOSHI Takuji , OHTSUKA Masaya , MISAWA Masaki , SUZUKI Akio , KURODA Masaharu , ICHIKAWA Naoki

    … Natural circulation type boiling water reactors are expected as promising next generation nuclear reactors, because recirculation system is reduced and loss of coolant event is mitigated. … Three-dimensional gas-liquid two-phase flow in the chimney above the core is important for developing natural circulation flow rate through void fraction profile and carry under bubbles into the downcomer. …

    The proceedings of the JSME annual meeting 2003.3(0), 191-192, 2003

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  • TED-AJ03-350 An Investigation into the Effect of Subcooled Liquid Inertia on Flowrate Induced Frequency-Response Characteristics of Horizontal Condensing Flow Systems :

    Kobus Chris J.

    … Physically, as the vapor flowrate is increased, lower density vapor tends to displace the higher density liquid in the two-phase region. … This displacement, in turn, simultaneously causes a temporary excess of vapor in the two-phase region, and the higher density liquid to leave the condenser, resulting in a flow surge. … On the contrary, when the inlet vapor flowrate is reduced, the opposite effect occurs. …

    Proceedings of the ... ASME/JSME Thermal Engineering Joint Conference 2003(6), 262, 2003

    NDL Digital Collections 

  • Numerical Simulation of CAES Champagne Effect (2nd Report, Preliminary Calculation for Plant Design)  [in Japanese]

    OKAWA Tomio , TANAKA Nobukazu , YAMAMOTO Ryosuke , MATSUI Goichi , MONJI Hideaki

    … In the present study, we examined optimum design of the CAES system through numerical calculations of the champagne effect based on a two-fluid model. … The construction cost can hence be reduced by shortening the U-bend. …

    Transactions of the Japan Society of Mechanical Engineers. Series B. 00064(00628), 3964-3969, 1998-12-25

    References (5)

  • LINEAR STABILITY ANALISIS OF THE KINETIC INTERNAL KINK MODE WITH THE SHEARED POLOIDAL FLOW.  [in Japanese]

    KOBAYASHI Toshimitsu , NAITOU Hiroshi , FUKUMASA Osamu , TOKUDA Shinji

    トカマクプラズマの不安定モードであるm=1(ポロイダルモード数)n=1(トロイダルモード数)の運動論内部キンクモードに対するポロイダルシアー流の効果を, ジャイロ簡約MHDコード(GRM3D-2F)を用いて調べた。GRM3D-2Fは, ジャイロ運動論ブラソフ・ポアソン・アンペール系のモーメント方程式を基礎方程式とし, 運動論効果として, 電子の慣性と磁力線方向の電子の圧力勾配の効果が取り入れられて …

    Memoirs of the Faculty of Engineering,Yamaguchi University 49(1), 57-64, 1998-10

    IR 

  • Numerical Simulation of CAES Champagne Effect. 2nd Report. Preliminary Calculation for Plant Design.  [in Japanese]

    OKAWA Tomio , TANAKA Nobukazu , YAMAMOTO Ryosuke , MATSUI Goichi , MONJI Hideaki

    … In the present study, we examined optimum design of the CAES system through numerical calculations of the champagne effect based on a two-fluid model. … The construction cost can hence be reduced by shortening the U-bend. …

    TRANSACTIONS OF THE JAPAN SOCIETY OF MECHANICAL ENGINEERS Series B 64(628), 3964-3969, 1998

    J-STAGE 

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